it is helpful to do sth it is helpful for doing sth it is helpful in doing sth 那个正确?Doing exercise is helpful ________ healthy. A. to keep B keeping C.keep D in keeping 哪个正确?选哪个 谢了如上 2个问题求 详解，

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it is helpful to do sth it is helpful for doing sth it is helpful in doing sth 那个正确?Doing exercise is helpful ________ healthy. A. to keep B keeping C.keep D in keeping 哪个正确?选哪个 谢了如上 2个问题求 详解，
it is helpful to do sth it is helpful for doing sth it is helpful in doing sth 那个正确?
Doing exercise is helpful ________ healthy. A. to keep B keeping C.keep D in keeping 哪个正确?选哪个 谢了
如上 2个问题求 详解， 这是基础训练的一道题 后边的答案说选D 不过我不懂 求解答 不知道 it is helpful in doing sth 对吗？

it is helpful to do sth it is helpful for doing sth it is helpful in doing sth 那个正确?Doing exercise is helpful ________ healthy. A. to keep B keeping C.keep D in keeping 哪个正确?选哪个 谢了如上 2个问题求 详解，
It's helpful to do sth 是正确的.It 是形式主语 真正的主语用 to do sth
It is helpful to be informed .
be helpful to sth to 是介词 ,后应该跟 动词的ing 形式所以A BC都不对
be helpful in （doing ）sth 表示在某方面有帮助
Doing exercise is helpful ___in keeping_____ healthy

My wrong..

be helpful to do sth。选择A。
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d为什么选D？？？讲下先看2个例句体会下： It is helpful to widen your knowledge to succeed in life. Books are helpful in widening your knowledge. 其实语言的学习到最后不会局限于死记硬背语法。（我自己语法不好，所以会这样找借口） It's helpful to do sth It ...

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选D是因为在这里是特别强调多做运动是保持健康的方法。
一般如果没有特别强调的话，用A或者B都可以。
B-是动词+ing 跟 A-动词前面+ to是一样的。

a

It is helpful to I think it helpful to do the housework和I think it is helpful to do the housework.有什么区别? it is helpful to do sth it is helpful for doing sth it is helpful in doing sth 那个正确?Doing exercise is helpful ________ healthy. A. to keep B keeping C.keep D in keeping 哪个正确?选哪个 谢了如上 2个问题求 详解， Is it helpful to study abroad?用英文回答 it's+adj.+for sb.to do sth.若for改为to用法!it is adj.to sb.to do sth.是一定存在的,eg:it is helpful to us.it is good to me.it is adj for sb.to do sth.出现更多：it was too hard for me to carry them.请问在什么时候用to,for,这个 Why do I need to know this information?Why is it quite helpful?What principle does it illustrate?How can I use this information?请翻译 It is _______to teach a kid the way to solve a problem than tell him the solution directly.A.helpful B.more helpful C.the most helpful Helping others is fun.It's helpful to do kind,peaceful things for others.One of my favouriteways to do this is developing my own helping habits.翻译谢谢 Sometimes it's_______to make a list of what you have to do.help helpless helpful helplessly To climb the mountain often is helpful for you=It is When something about you is said ,you should listen patiently first ,and then do something goodwith it .it will be very helpful to you .Do not just close your ears in anger and feel hurt She is a very helpful person,she always thinks t___before she decides what to do. 英语翻译1.__is thought to be good for people and society is necessary___.A.What;to do B.It;to be done C.Whatever;to do D.Whichever;to be done2.He has made many friends,____is helpful to him when he is in trouble.A.which B.who C.it D.that3.It is c be helpful to do为什么不对 it is polite to do The book is so helpful that I want to buy it.that的用法?什么成分? It is lucky for the old people to have a helpful community centre 同义句 When something said about you is ture,you'll find it well be helpful to you .